Era
20th century
163
19th century
70
1900-1999
43
1800-1899
14
1865-
12
Civil War, 1861-1865
9
1783-1850
6
Since 1865
6
1800-1999
5
1843-1916
4
18th century
4
1900 - 1999
4
1908-1960
4
1914-1997
4
1922-1969
4
1926-1997
4
1743-1826
3
1768-1812
3
1801-1809
3
1803-1882
3
1809-1817
3
1819-1891
3
1849-1877
3
1874-1946
3
1896-1940
3
1934-
3
Colonial period, ca. 1600-1775
3
To 1700
3
1608-1674
2
1783-1899
2
17th century
2
1819-1892
2
1837-1920
2
1842-1914?
2
1872-1906
2
1900-2099
2
1901-1953
2
1909-1955
2
1910-1999
2
1916-1990
2
1929
2
21st century
2
Early modern, 1500-1700
2
1591-1643
1
1672-1719
1
1700-1899
1
1783-1859
1
1783-1865
1
1794-1878
1
1800 - 1899
1
more ...